They have made a statement on the CIC site today for this
http://www.cic.gc.ca/english/department/media/notices/2016-07-06.asp
i am waiting for my PR card and i am travelling out of country in september . i am planning to call them and ask them to send me the card via courier instead of holding it till the strike ends .
any idea which number i should be calling ? is it the regular CIC number we call for inquiries?